RODI TDS in mixing tub

[Lionsreef]

I was making RODI water today and testing it as it comes out of the 4 stage RODI filter. It was reading ~160 in and 0 TDS out.

I then put the fresh RODI water into my 20 gallon saltwater mixing tub which is a food grade Sterilite storage container.

Within minutes I tested the water and it read 45 ppm. Is that normal since there are trace amounts of salt and other minerals in the container from prior use or should I be concerned and look for a different mixing container?

 

[Lionsreef]

This is Sterilite tote that I'm currently using.

https://www.target.com/p/sterilite-...VmkoNCh0nTAA1EAQYASABEgIvrPD_BwE&gclsrc=aw.ds

 

[hotashes]

I’d say this is normal, ONLY due to the fact it’s had salted water prior used in the container

A.

 

[ylreefer]

I was making RODI water today and testing it as it comes out of the 4 stage RODI filter. It was reading ~160 in and 0 TDS out.

I then put the fresh RODI water into my 20 gallon saltwater mixing tub which is a food grade Sterilite storage container.

Within minutes I tested the water and it read 45 ppm. Is that normal since there are trace amounts of salt and other minerals in the container from prior use or should I be concerned and look for a different mixing container?

Hi lionsreef.
I'm sure others will chime in to confirm but Iv also find the same to be true when using my old salt bucket to store my new RODI. I believe yes its due to the trace elements in the salt residue left in the bucket.

I do clean the bucket and dry it out after use but obviously it's not so easy to clear all traces away. I would think you have nothing to worry about there.

 

[Randy Holmes-Farley]

It's normal. Even salty dust from the air will boost it. 45 ppm is hardly any. Seawater is tens of thousands of ppm TDS.

 

[Lionsreef]

Thank you all for your responses. That was what I was hoping.

 

[Randy Holmes-Farley]

You're welcome.

Happy Reefing.